Worksheet Chapter 15 (2008) - Worksheet Chapter 15 Define...

Worksheet
Chapter 15
Define the following:
A. chemical equilibrium-
B. law of mass action-
C. Le Chatelier's principle-
D. heterogeneous equilibria
Solve the following:
1. What is a heterogeneous catalyst? ___________________________
2. What is the equilibrium expression for the following reaction:
2A + 5B 
___________________
3. What is the K
p
of the above reaction if the P
A
= 35 torrs, P
B
= 10
torrs, and P
C
= 0.56 torrs?
3C
______________
4. What is the equilibrium expressions for Kc and Kp for the following
reaction?
SnO
2(s)
+ 2CO
(g)
 Sn
(s)
+ 2CO
2(g)
_____________________________, ___________________________
5. What is the equilibrium constant for the above equation if the
equilibrium concentrations are: [CO] = 3.4 M, [CO
2
] = 2.1 x 10 -1
_______________
6. What is the direction of the equilibrium of Number 5? _________
7. A mixture of 1.374 g of H
2
, and 70.31 g of Br
2
is heated in a
M

2.00 L vessel at 700 K. These substances react as follows:
H
2
(g) + Br
2
(g)  2HBr(g)
At equilibrium the vessel is found to contain 0.566 g of H
2
.
(a) Calculate the equilibrium concentrations of H
2
, Br
2
, and HBr.
(b) Calculate K
c
.
__________
8. For problem 7, what is the K
c
for the reverse reaction?
_______________
9. At 373 K, Kp = 0.416 for the equilibrium
2NOBr(g) 